Steel pipe with a double-armored concrete coating.



A. J. BONNA.

STEEL PIPE WITE A DOUBLE ARMORED CONCRETE GOATING. 'APPLIOATION FILEDNov. 15, 1905.

` 921,354g Patentedmayuwog.

2 SHEETS-SHEET l. @y 2 A. J. BUENA. A STEEL TIPE WITH A DOUBLE AEMOEEECONCRETE GOATING.

APPLICATION FILED NOVfl, 1905. y 4 921,354, Patented May 11, 1909.

2 SHEETS-SHEET 2.

Tj z d ii 4L L Q 3 4' Y j M E es; r "7 iin/m9710307:

'UNITED STATES Pitiiillllii AIME JOSEPH BONNA, OF PAR-153,. FRA'GE.

STEEL PIlE WITH A D'OU'BLE-ARll/O'JEH]D CONRETE COATING.

Specification of Letters atent.

Patented May 1 i, 1909.

. Application filed November 15, 1905. Serial No. 287,597.

Amored Cement Coating 5 and I do hereby declare the following to be afull, clear, and

exact description of the invention, such as will enable'others skilledin the art to which it appertains to make and use tiie'same,referciicebeing had to the accompanying drawings, and to letters orfigures of reference marked thereon, which forni a part of thisspecification.

The invention relates to improvements in pipes made of armored cement orother analogous material, such for example as ashes tos-cement (fibersof asbestos agglomorated by means of cement), itself strengthened by ametallic armature and it consists in embedding in, the thickness ofthese pipes a steel tube, preferably of soft steel, .formed of a sheet,the edges of which are soldered autogenously alter having been clippedin a special manner which avoids all slip or detachment' during thesoldering'.

It consists, further in the employment, as an armature of the cement orothei` analogous material forming the exterior coating and the interiorcoating of the metallic tube, of steel bars of a Atransverse section inthe form of a cross'with the object of increasin the bindrigi ity of theenvelop.

It consists, finally, in lacing, in certain positions in conduits of tis kind, a special arrangement which permits of the ready piercing of ahole for making a branch con'- nection, even when the conduits are underpressure, it avoiding the necessity of cutting the armature, which isalways a very difiicult operation.

Pipes constructed in accordance with the present improvements combinethe advantages of soldered steel pipes (very great elas? ticity,resistance, lightness, iniperviousness) With those of armoredy coveringsof cement or other analogous material (rigidity, incorrodibility,insuring indeiinitc durability).

()uring to the particular means of fastening 'which is employed formaking the pipe, use

may be 'made of hammered and ro led steel consequently imparting to thepipe gro-it tenacity, great elasticity, considcriiblc resistance, andthe edges may be united without riveting or any other incthcdoiconnection than the autogenous soldering. The facility with which also econduit may be tapped by N cw .b s .nu ,.'.Y1..... h. tA means oi trie.i oi t sait specie ....iianpcinen.

employed for this purpose, presents more'- over a greet al lvantegc.

In the case oi i i'or conductiu f U4as the interior coating of the steeltube may be made of armored pitch or tar.

The invention is specially advantageous for conduits of large diameterservingfor the supply of water, gas, etc., to towns, es also for theindustrial utilisation of water-falls, which conduits have to resistconsiderable interior pressures and often must be of greet rigidity.l

In the drawings, Figure l .illustrates a pipe with the iiriprovcnientsapplied thereto taken respectively on the lines iti, B, and C, D, oiFig. 2. tion ther-eci. Fig'. 3 is an elevation ol' same, the armaturebeing left exposed upon e portion lof such iigure. Figs. et and 5 are alon- `gitudinal section and a transverse section illustrating theclipping of the sheets which :iorin the steel tube. Fig. 6 is transversesection ci' a 4pipe illustrating the arrange ment which permits ci ahole being pierced While under pressure, end also shows the collar forthe connection. longitudinal sections illustrating the application oi'the same arrangement respectively toa pipe fitted with a steel tube anda double armored' cement coating, to a pipe ci ermored cement with aninterior tube of glass, and to a pipe of armored cement without tube,this arrangement being capable of employment with the saine edvez geWhether there isor is not e. steel tube within the pi e.

ln all these fig lires, 1 indicates the sheet steel tube; 2 thelongiti'idinal armature bars; and 3 the transversal, both ol' sainebeing ol' cruciiorni section. the asbestos-cement or other analogousinaterial. 5 is a connection ring oi' armored cement.

l object of clipping the two extremities one to the other beforesoldering same, whenever Fig. 2 is a longitudinal'se Figs. 7, 8 and 9are et indicates the cement,

the thickness ol' the sheet metal is sufficient i to permit of this.Chainiers 9, 10, and a shoulder 11, Fig. 5, are similarly formed on thelongitudinal edges ol the sheet metal. When the two parts to beconnectedL have In zu been brought to fit one into the other, they areclipped or hooked together' by shoulders 8 or 11, in such rt waz; thatduring the eet of soldering there. b3.' the autogenous soldering, thereis no need te nur any slip occurring. As will be seen by Fig. 4 thesaine process may be employed tor lining on a straight sheet metal pipea flange l2 or sleeve 13, the abutting surface el' the part lf2 or 13beingr then elranrl'ered on its inner edge in-the saine manner as theextremity ol the wipe, as will be seen at 14, 15, 16, and 147, l l. it),

(Figs. 6, 7, 8, 9) is the part whieh' perniits of the ready effect-inglot etnn'reotiens to pipes under pressure. hit; l5 also shows aconnecting clamping pressure collar 2L. The 'part 20 isinserted in theexterior envelop el armored een'rent behnf;I niaintainml by the metalliearnmture 23, and lined by soldering` to tl l steel tube l (Fig. 7). litsheight is equal to the thielness ol' the exterior envelop oi' armoredeenrent; it may l'or example be ol east steel or iron and eemprises atubular part 21 and an upper oval eover 22. lt een be pierced withoutenr-ountering.;l any armature whatever so that it perniits ol connectionunder pressure, as in enst iron pipes. For pipes with inner glass tubes.24 (Fig. 8), the eonneetion 2U is embedded in the envelop oli' cementand supported b3' the armature, by means olthe llange 26 with which itis provided, then eonneeted to the glass tube by e plastic joint ol'india..

rubber and pitch. When there is no tube within the pipe 0) the part 2Ois embedded in the cement envelop, and supported by tl e :armaturethrough the flange 27.

that lV elaiin as nry inventiony and desire to secure b-y LettersPatent, is

$.11 armored pipe composed ol'a lurality oll metal sheets l'ormed intotubes, said sheets having ehanil'ered edges formed by oil-set parallellmveled l'aees ertelulinr longitudinally ol' the sheet whereby saidedges are interloehed when brought together, an e3.'- teinalljv andperipherallj.' ehainl'ered end, aninlernallv and periplnsrallyehmul'ered end, said ehuinl'ered ends lornred by' ell-set beveled endlares, \\'hereb)v eonseeutive pipe` lengths are interltwlqed andpre-vented from eeeidenta-l longitudinal displacementI longitudinal andperipheral armor embedded in rement surrouiuling;` the tube and havingl.an hiatus in the arnror7 a braneh pipe e nneeingY nrenibei" having anouter and an inner llange extending over ends el the armor, one p ol'said ilanges llush with the outer surfer-e ol' the pipe.7 and aehamberin said connection e mnnunieatingi with the interior ol' the tube. .lntestimony that l elairn the 'oregoing as in v invention, l have signedmy naine in presenee ol' subseribing Witnesses.

` AlME lOSElll BUNNA.

\`\v itnesses: v l`f`aif1nnrne W. (Zarnnuyntd 'l. .Y (,AULnWs-m.. ALeIDnFARE,

